diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index a48e889..dea8978 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -7,11 +7,11 @@ jobs:
       fail-fast: false
       matrix:
         # arch: ["armv6", "armv7", "aarch64", "amd64"]
-        php: ["8.0", "8.1", "8.2"]
+        php: ["8.0", "8.1", "8.2", "8.3", "8.4"]
         type: ["ts", "nts"]
     steps:
     - name: Checkout code
-      uses: actions/checkout@v3
+      uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
 
     - name: Install dependencies
       run: |
@@ -19,7 +19,7 @@ jobs:
         sudo apt-get install libi2c-dev -y
 
     - name: Setup PHP
-      uses: shivammathur/setup-php@v2
+      uses: shivammathur/setup-php@c541c155eee45413f5b09a52248675b1a2575231 # v2.31.1
       with:
         php-version: ${{ matrix.php }}
         coverage: none